Abstract: Control screws are utilized to change overturning the movement into translatory movement. A screw jack is a case of a power fasten which a little constrain connected on a flat plane is utilized to raise or lower a huge load. The rule on which it works is like that of a slanted plane. The favorable mechanical position of a screw jack is the proportion of the heap connected to the exertion combined. The screw jack is worked by turning a lead screw. The stature of the jack is balanced by rotating a lead screw and this alteration should be possible either physically or by coordinating an electric engine.